Decorative plate



FIG. 1 is a front perspective view of the decorative plate, according to our design;

FIG. 2 is a front view of our design;

FIG. 3 is a back view of our design;

FIG. 4 is a left side view of our design;

FIG. 5 is a right side view of our design;

FIG. 6 is a top view of our design; and,

FIG. 7 is a bottom view of our design. 

The ornamental design for a decorative plate, as shown and described. 